package com.sky.service.admin.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.exception.*;
import com.sky.mapper.admin.EmployeeMapper;
import com.sky.pojo.Employee;
import com.sky.result.PageResult;
import com.sky.service.admin.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.PathVariable;

import javax.annotation.Resource;
import java.nio.charset.StandardCharsets;
import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl  implements EmployeeService {

    @Resource
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();//

        //1、根据用户名查询数据库中的数据  select * from employee where username = #{username}
        Employee employee = employeeMapper.getByUsername(username); //

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        //md5加密密码，验证密码正确性必须加密之后判断
        password=DigestUtils.md5DigestAsHex(password.getBytes(StandardCharsets.UTF_8));
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }
        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void addEmployee(EmployeeDTO employeeDTO) {
        //健壮性判断，如果新增用户在数据库里存在，就给客户端一个友好的提示
        Employee username = employeeMapper.getByUsername(employeeDTO.getUsername());
        if (username !=null){
            //抛出异常给全局异常处理器接收返回给客户端
            throw new EmployeeNameExistException("账号已存在！");
        }
        //创建Employee对象，待会会将属性值封装进去，传给mapper插入
        Employee employee = new Employee();
        //将employeeDTO的属性拷贝到employee对象中
        BeanUtils.copyProperties(employeeDTO,employee);
        //封装加密后的密码
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes(StandardCharsets.UTF_8)));
        //初始化值
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.addEmployee(employee);
    }

    /**
     * 员工分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult employeePaginationQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());
        Page page= (Page) employeeMapper.employeePaginationQuery(employeePageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 启用禁用员工账号
     * @param status
     * @return
     */
    @Override
    public void enableAndDisableEmployeeAccounts(Integer status,Long id) {
        employeeMapper.enableAndDisableEmployeeAccounts(status,id);
    }

    /**
     * 根据ID查询员工，数据回显
     * @param id
     * @return
     */
    @Override
    public Employee searchEmployeeById(Long id) {
        return employeeMapper.searchEmployeeById(id);
    }

    /**
     * 根据id修改员工
     * @return
     */
    @Override
    public void modifyEmployeesById(Employee employee) {
        employeeMapper.modifyEmployeesById(employee);
    }


}
